Use uv to manage dependencies

[fyliu]

Fixes #178 Fixes #183

What changes did you make?

• Added missing doc item for ERD generating script
• Set up uv to manage dependencies + docs
• Replace pip with uv for faster installs
• Set up docker buildkit cache mounts for faster image rebuilds + docs

Why did you make the changes (we will use this info to test)?

• We needed a way to update dependencies

How to test

• verify the update script works ./scripts/update-dependencies.sh
• verify the buildrun script works ./scripts/buildrun.sh
• verify the erd script works ./scripts/erd.sh
• verify all tests still pass ./scripts/test.sh

[fyliu]

Rebased to latest main and force pushed

[fyliu]

Found a problem when running where nc is required. Will undo those changes and re-evaluate the apt requirements later.

[fyliu]

restored the missing apt dependencies and force pushed

[fyliu]

I'm still not sure on the ./scripts/erd.sh, can't find an end.png

@freaky4wrld It should be in app/erd.png

❯ file app/erd.png
app/erd.png: PNG image data, 5113 x 1379, 8-bit/color RGBA, non-interlaced

I also amended the erd commit with the location of the generated image.